Add 28/45 and 18/42
28/45 + 18/42 is 331/315.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 42 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 45 × 14 = 630,
28/45 = 28 × 14/45 × 14 = 392/630 - Likewise, for the 2nd fraction, since 42 × 15 = 630,
18/42 = 18 × 15/42 × 15 = 270/630 - Add the two like fractions:
392/630 + 270/630 = 392 + 270/630 = 662/630 - 662/630 simplified gives 331/315
- So, 28/45 + 18/42 = 331/315
In mixed form: 116/315
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